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3 years ago

PLEASE ANSWER FAST

Chemistry

1 answer:

dimaraw [331]3 years ago

8 0

B. P1/V1=P2V2

Hope this helped you out!!

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How many liters of phosphine are produced when 34 L of hydrogen reacts with an excess of phosphorus under STP?

Keith_Richards [23]

Answer:

22.67 L of PH₃

Explanation:

The balanced equation is:

$P_4 (s) + 6H_2(g) \to 4PH_3(g)$

From the equation:

$34 L \times \dfrac{1 \ mol \ of H_2 }{22.4 \ L \ H_2} \times \dfrac{4 \ mol \ of \ PH_3}{6 \ mol \ H_2} \times \dfrac{22.4 \ L \ PH_3}{1 \ mol \ PH_3}$

= 22.67 L of PH₃

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3 years ago

What are the building blocks of proteins?

bogdanovich [222]

Answer:

amino acids

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3 years ago

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The state of matter in which a material has definite shape and definite volume is the

goldenfox [79]

Answer:

It's a solid.

Explanation:

Solids never change their shape as opposed to gases and liquids. This is because their molecules are tightly packed together. Since all solids have a definite shape, it's volume will also be definite.

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3 years ago

How many atoms are present in 8.00g of He?

uranmaximum [27]

Answer:

1.20 × 10²⁴ atoms He

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

8.00 g He

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of He - 4.00 g/mol

Step 3: Convert

$8.00 \ g \ He(\frac{1 \ mol \ He}{4.00 \ g \ He} )(\frac{6.022 \cdot 10^{23} \ atoms \ He}{1 \ mol \ He} )$ = 1.2044 × 10²⁴ atoms He

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.2044 × 10²⁴ atoms He ≈ 1.20 × 10²⁴ atoms He

3 0

3 years ago

I NEED HELP FAST THIS IS DUE AT 9:00

aleksandrvk [35]

elements is the answer

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3 years ago